//
//  UserAccount.swift
//  LBWeibo
//
//  Created by 李博 on 15/6/26.
//  Copyright © 2015年 libo. All rights reserved.
//

import UIKit

// swift 1.2 Printable 协议
// swift 2.0 协议变了 CustomStringConvertible
class UserAccount: NSObject,NSCoding {
    
    /// 用于调用access_token，接口获取授权后的access token
    var access_token: String
    /// access_token的生命周期，单位是秒数(实际是数值！)
    var expires_in: NSTimeInterval
    /// 当前授权用户的UID
    var uid: String
    ///过期时间
    var expiresDate: NSDate
    
    var name: String?
    var avatar_large: String?
    
    
    init(dict: [String: AnyObject]) {
        access_token = dict["access_token"] as! String
        expires_in = dict["expires_in"] as! NSTimeInterval
        uid = dict["uid"] as! String
        
        //计算过期时间
        expiresDate = NSDate(timeIntervalSinceNow: expires_in)
    }
    //加载用户信息
    func loadUserInfo(finished: (account: UserAccount?,error: NSError?) -> ()) {
        
        let params = ["access_token":access_token,"uid":uid]
        
        NetworkTools.sharedNetworkTools().GET("2/users/show.json", parameters: params, success: { (_, JSON) -> Void in
            
            let dict = JSON as! [String: AnyObject]
            self.name = dict["name"] as? String
            self.avatar_large = dict["avatar_large"] as? String
            //保存用户信息,闭包里要用self调用
            self.saveAccount()
            
            //通知调用方，处理完成
            finished(account: self, error: nil)
            
            }) { (_, error) -> Void in
                
                finished(account: nil, error: error)
                
        }
    }
    
    
    ///打印用户信息
    override var description: String {
        
        let description = ["access_token","expires_in","uid", "avatar_large", "name"]
        return "\(dictionaryWithValuesForKeys(description))"
    }
    
    
    // MARK: - 保存和加载文件
    ///归档路径  swift中类常量都是使用static来定义的
    static let accountPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!.stringByAppendingPathComponent("account.plist")
    ///保存到沙盒
    func saveAccount() {
        print(UserAccount.accountPath)
        NSKeyedArchiver.archiveRootObject(self, toFile: UserAccount.accountPath)
    }
    ///从沙盒加载
    class func loadAccount() -> UserAccount?{
        print("从沙盒加载账户信息。。")
        //判断token是否过期
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(accountPath) as? UserAccount {
            if account.expiresDate.compare(NSDate()) == NSComparisonResult.OrderedDescending {
                return account
            }
        }
        return nil
    }
    
    // MARK: - NSCoding 归档解档
    //解挡
    required init?(coder aDecoder: NSCoder) {
        
        access_token = aDecoder.decodeObjectForKey("access_token") as! String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        expiresDate = aDecoder.decodeObjectForKey("expiresDate") as! NSDate
        uid = aDecoder.decodeObjectForKey("uid") as! String
        
        name = aDecoder.decodeObjectForKey("name") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        
        
    }
    //归档
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        aCoder.encodeObject(uid, forKey: "uid")
        
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
    }
}
